BPW Corner Steadies - pivot screws fall out

We have had the screws come loose of the pivots of the corner steadies a few times on our Elddis 2010 with BPW chassis.  This is where the part moves along the main jacking screw, and the leg is secured on each side to the part that moves along the main screw.

This time found 3 of them completely missing.  The screw on 1 side cannot come out so the legs will not totally fall off, but best if both sides are in place.

Posting this so others know what screw and washer size is needed as I could not find anything online.  

The screws are 14 gauge (No. 14) x 1.2" self taping pan head screws with M6 penny washers.  I got them from http://www.intasprintfasteners.co.uk/index2.html who can post to anywhere in the UK.

I've put them back with some silicone to stop them coming loose again.

I'm sure this will be the same on many other peoples caravans but they do not realise.